trunk/rdesktop/rdpsnd_oss.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions - Open Sound System
   Copyright (C) Matthew Chapman 2003-2007
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
   Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/* 
   This is a workaround for Esound bug 312665. 
   FIXME: Remove this when Esound is fixed. 
*/
#ifdef _FILE_OFFSET_BITS
#undef _FILE_OFFSET_BITS
#endif

#include "rdesktop.h"
#include "rdpsnd.h"
#include "rdpsnd_dsp.h"
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <sys/types.h>
#include <sys/stat.h>

#define DEFAULTDEVICE   "/dev/dsp"
#define MAX_LEN         512

static int dsp_fd = -1;
static int dsp_mode;
static int dsp_refs;

static RD_BOOL dsp_configured;
static RD_BOOL dsp_broken;

static RD_BOOL dsp_out;
static RD_BOOL dsp_in;

static int stereo;
static int format;
static int snd_rate;
static short samplewidth;
static char *dsp_dev;
static RD_BOOL in_esddsp;

/* This is a just a forward declaration */
static struct audio_driver oss_driver;

void oss_play(void);
void oss_record(void);

void
oss_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
{
        if (dsp_fd == -1)
                return;

        if (dsp_out && !rdpsnd_queue_empty())
                FD_SET(dsp_fd, wfds);
        if (dsp_in)
                FD_SET(dsp_fd, rfds);
        if (dsp_fd > *n)
                *n = dsp_fd;
}

void
oss_check_fds(fd_set * rfds, fd_set * wfds)
{
        if (FD_ISSET(dsp_fd, wfds))
                oss_play();
        if (FD_ISSET(dsp_fd, rfds))
                oss_record();
}

static RD_BOOL
detect_esddsp(void)
{
        struct stat s;
        char *preload;

        if (fstat(dsp_fd, &s) == -1)
                return False;

        if (S_ISCHR(s.st_mode) || S_ISBLK(s.st_mode))
                return False;

        preload = getenv("LD_PRELOAD");
        if (preload == NULL)
                return False;

        if (strstr(preload, "esddsp") == NULL)
                return False;

        return True;
}

RD_BOOL
oss_open(int fallback)
{
        int caps;

        if (dsp_fd != -1)
        {
                dsp_refs++;

                if (dsp_mode == O_RDWR)
                        return True;

                if (dsp_mode == fallback)
                        return True;

                dsp_refs--;
                return False;
        }

        dsp_configured = False;
        dsp_broken = False;

        dsp_mode = O_RDWR;
        dsp_fd = open(dsp_dev, O_RDWR | O_NONBLOCK);
        if (dsp_fd != -1)
        {
                ioctl(dsp_fd, SNDCTL_DSP_SETDUPLEX, 0);

                if ((ioctl(dsp_fd, SNDCTL_DSP_GETCAPS, &caps) < 0) || !(caps & DSP_CAP_DUPLEX))
                {
                        close(dsp_fd);
                        dsp_fd = -1;
                }
        }

        if (dsp_fd == -1)
        {
                dsp_mode = fallback;

                dsp_fd = open(dsp_dev, dsp_mode | O_NONBLOCK);
                if (dsp_fd == -1)
                {
                        perror(dsp_dev);
                        return False;
                }
        }

        dsp_refs++;

        in_esddsp = detect_esddsp();

        return True;
}

void
oss_close(void)
{
        dsp_refs--;

        if (dsp_refs != 0)
                return;

        close(dsp_fd);
        dsp_fd = -1;
}

RD_BOOL
oss_open_out(void)
{
        if (!oss_open(O_WRONLY))
                return False;

        dsp_out = True;

        return True;
}

void
oss_close_out(void)
{
        oss_close();

        /* Ack all remaining packets */
        while (!rdpsnd_queue_empty())
                rdpsnd_queue_next(0);

        dsp_out = False;
}

RD_BOOL
oss_open_in(void)
{
        if (!oss_open(O_RDONLY))
                return False;

        dsp_in = True;

        return True;
}

void
oss_close_in(void)
{
        oss_close();

        dsp_in = False;
}

RD_BOOL
oss_format_supported(RD_WAVEFORMATEX * pwfx)
{
        if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
                return False;
        if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
                return False;
        if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
                return False;

        return True;
}

RD_BOOL
oss_set_format(RD_WAVEFORMATEX * pwfx)
{
        int fragments;
        static RD_BOOL driver_broken = False;

        if (dsp_configured)
        {
                if ((pwfx->wBitsPerSample == 8) && (format != AFMT_U8))
                        return False;
                if ((pwfx->wBitsPerSample == 16) && (format != AFMT_S16_LE))
                        return False;

                if ((pwfx->nChannels == 2) != !!stereo)
                        return False;

                if (pwfx->nSamplesPerSec != snd_rate)
                        return False;

                return True;
        }

        ioctl(dsp_fd, SNDCTL_DSP_RESET, NULL);
        ioctl(dsp_fd, SNDCTL_DSP_SYNC, NULL);

        if (pwfx->wBitsPerSample == 8)
                format = AFMT_U8;
        else if (pwfx->wBitsPerSample == 16)
                format = AFMT_S16_LE;

        samplewidth = pwfx->wBitsPerSample / 8;

        if (ioctl(dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
        {
                perror("SNDCTL_DSP_SETFMT");
                oss_close();
                return False;
        }

        if (pwfx->nChannels == 2)
        {
                stereo = 1;
                samplewidth *= 2;
        }
        else
        {
                stereo = 0;
        }

        if (ioctl(dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
        {
                perror("SNDCTL_DSP_CHANNELS");
                oss_close();
                return False;
        }

        oss_driver.need_resampling = 0;
        snd_rate = pwfx->nSamplesPerSec;
        if (ioctl(dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
        {
                int rates[] = { 44100, 48000, 0 };
                int *prates = rates;

                while (*prates != 0)
                {
                        if ((pwfx->nSamplesPerSec != *prates)
                            && (ioctl(dsp_fd, SNDCTL_DSP_SPEED, prates) != -1))
                        {
                                oss_driver.need_resampling = 1;
                                snd_rate = *prates;
                                if (rdpsnd_dsp_resample_set
                                    (snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False)
                                {
                                        error("rdpsnd_dsp_resample_set failed");
                                        oss_close();
                                        return False;
                                }

                                break;
                        }
                        prates++;
                }

                if (*prates == 0)
                {
                        perror("SNDCTL_DSP_SPEED");
                        oss_close();
                        return False;
                }
        }

        /* try to get 12 fragments of 2^12 bytes size */
        fragments = (12 << 16) + 12;
        ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);

        if (!driver_broken)
        {
                audio_buf_info info;

                memset(&info, 0, sizeof(info));
                if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
                {
                        perror("SNDCTL_DSP_GETOSPACE");
                        oss_close();
                        return False;
                }

                if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0)
                {
                        fprintf(stderr,
                                "Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
                                info.fragments, info.fragstotal, info.fragsize);
                        driver_broken = True;
                }
        }

        dsp_configured = True;

        return True;
}

void
oss_volume(uint16 left, uint16 right)
{
        uint32 volume;

        volume = left / (65536 / 100);
        volume |= right / (65536 / 100) << 8;

        if (ioctl(dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
        {
                warning("hardware volume control unavailable, falling back to software volume control!\n");
                oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
                rdpsnd_dsp_softvol_set(left, right);
                return;
        }
}

void
oss_play(void)
{
        struct audio_packet *packet;
        ssize_t len;
        STREAM out;

        /* We shouldn't be called if the queue is empty, but still */
        if (rdpsnd_queue_empty())
                return;

        packet = rdpsnd_queue_current_packet();
        out = &packet->s;

        len = out->end - out->p;

        len = write(dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len);
        if (len == -1)
        {
                if (errno != EWOULDBLOCK)
                {
                        if (!dsp_broken)
                                perror("RDPSND: write()");
                        dsp_broken = True;
                        rdpsnd_queue_next(0);
                }
                return;
        }

        dsp_broken = False;

        out->p += len;

        if (out->p == out->end)
        {
                int delay_bytes;
                unsigned long delay_us;
                audio_buf_info info;

                if (in_esddsp)
                {
                        /* EsounD has no way of querying buffer status, so we have to
                         * go with a fixed size. */
                        delay_bytes = out->size;
                }
                else
                {
#ifdef SNDCTL_DSP_GETODELAY
                        delay_bytes = 0;
                        if (ioctl(dsp_fd, SNDCTL_DSP_GETODELAY, &delay_bytes) == -1)
                                delay_bytes = -1;
#else
                        delay_bytes = -1;
#endif

                        if (delay_bytes == -1)
                        {
                                if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) != -1)
                                        delay_bytes = info.fragstotal * info.fragsize - info.bytes;
                                else
                                        delay_bytes = out->size;
                        }
                }

                delay_us = delay_bytes * (1000000 / (samplewidth * snd_rate));
                rdpsnd_queue_next(delay_us);
        }
}

void
oss_record(void)
{
        char buffer[32768];
        int len;

        len = read(dsp_fd, buffer, sizeof(buffer));
        if (len == -1)
        {
                if (errno != EWOULDBLOCK)
                {
                        if (!dsp_broken)
                                perror("RDPSND: read()");
                        dsp_broken = True;
                        rdpsnd_queue_next(0);
                }
                return;
        }

        dsp_broken = False;

        rdpsnd_record(buffer, len);
}

struct audio_driver *
oss_register(char *options)
{
        memset(&oss_driver, 0, sizeof(oss_driver));

        oss_driver.name = "oss";
        oss_driver.description =
                "OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV";

        oss_driver.add_fds = oss_add_fds;
        oss_driver.check_fds = oss_check_fds;

        oss_driver.wave_out_open = oss_open_out;
        oss_driver.wave_out_close = oss_close_out;
        oss_driver.wave_out_format_supported = oss_format_supported;
        oss_driver.wave_out_set_format = oss_set_format;
        oss_driver.wave_out_volume = oss_volume;

        oss_driver.wave_in_open = oss_open_in;
        oss_driver.wave_in_close = oss_close_in;
        oss_driver.wave_in_format_supported = oss_format_supported;
        oss_driver.wave_in_set_format = oss_set_format;
        oss_driver.wave_in_volume = NULL;       /* FIXME */

        oss_driver.need_byteswap_on_be = 0;
        oss_driver.need_resampling = 0;

        if (options)
        {
                dsp_dev = xstrdup(options);
        }
        else
        {
                dsp_dev = getenv("AUDIODEV");

                if (dsp_dev == NULL)
                {
                        dsp_dev = DEFAULTDEVICE;
                }
        }

        return &oss_driver;
}
1	astrand	963	/* -- c-basic-offset: 8 --
2	matthewc	475	rdesktop: A Remote Desktop Protocol client.
3			Sound Channel Process Functions - Open Sound System
4	jsorg71	1365	Copyright (C) Matthew Chapman 2003-2007
5	matthewc	475	Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6	jsorg71	1365	Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
7	matthewc	475
8			This program is free software; you can redistribute it and/or modify
9			it under the terms of the GNU General Public License as published by
10			the Free Software Foundation; either version 2 of the License, or
11			(at your option) any later version.
12
13			This program is distributed in the hope that it will be useful,
14			but WITHOUT ANY WARRANTY; without even the implied warranty of
15			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16			GNU General Public License for more details.
17
18			You should have received a copy of the GNU General Public License
19			along with this program; if not, write to the Free Software
20			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21			*/
22
23	astrand	1227	/*
24			This is a workaround for Esound bug 312665.
25			FIXME: Remove this when Esound is fixed.
26			*/
27			#ifdef _FILE_OFFSET_BITS
28			#undef _FILE_OFFSET_BITS
29			#endif
30
31	matthewc	475	#include "rdesktop.h"
32	stargo	1254	#include "rdpsnd.h"
33	stargo	1269	#include "rdpsnd_dsp.h"
34	matthewc	475	#include <unistd.h>
35			#include <fcntl.h>
36			#include <errno.h>
37	ossman_	1302	#include <unistd.h>
38	stargo	510	#include <sys/time.h>
39	matthewc	475	#include <sys/ioctl.h>
40			#include <sys/soundcard.h>
41	ossman_	1302	#include <sys/types.h>
42			#include <sys/stat.h>
43	matthewc	475
44	stargo	1254	#define DEFAULTDEVICE "/dev/dsp"
45	stargo	1247	#define MAX_LEN 512
46	matthewc	475
47	ossman_	1346	static int dsp_fd = -1;
48	ossman_	1361	static int dsp_mode;
49			static int dsp_refs;
50	ossman_	1346
51	jsorg71	1372	static RD_BOOL dsp_configured;
52	ossman_	1376	static RD_BOOL dsp_broken;
53	ossman_	1361
54	jsorg71	1372	static RD_BOOL dsp_out;
55			static RD_BOOL dsp_in;
56	ossman_	1361
57			static int stereo;
58			static int format;
59	stargo	1247	static int snd_rate;
60			static short samplewidth;
61	stargo	1255	static char *dsp_dev;
62	jsorg71	1372	static RD_BOOL in_esddsp;
63	matthewc	475
64	ossman_	1345	/* This is a just a forward declaration */
65			static struct audio_driver oss_driver;
66
67	ossman_	1346	void oss_play(void);
68	ossman_	1361	void oss_record(void);
69	ossman_	1346
70			void
71			oss_add_fds(int n, fd_set rfds, fd_set * wfds, struct timeval *tv)
72			{
73			if (dsp_fd == -1)
74			return;
75
76	ossman_	1361	if (dsp_out && !rdpsnd_queue_empty())
77			FD_SET(dsp_fd, wfds);
78			if (dsp_in)
79			FD_SET(dsp_fd, rfds);
80	ossman_	1346	if (dsp_fd > *n)
81			*n = dsp_fd;
82			}
83
84			void
85			oss_check_fds(fd_set * rfds, fd_set * wfds)
86			{
87			if (FD_ISSET(dsp_fd, wfds))
88			oss_play();
89	ossman_	1361	if (FD_ISSET(dsp_fd, rfds))
90			oss_record();
91	ossman_	1346	}
92
93	jsorg71	1372	static RD_BOOL
94	ossman_	1302	detect_esddsp(void)
95			{
96			struct stat s;
97			char *preload;
98
99	ossman_	1346	if (fstat(dsp_fd, &s) == -1)
100	ossman_	1302	return False;
101
102			if (S_ISCHR(s.st_mode) \|\| S_ISBLK(s.st_mode))
103			return False;
104
105			preload = getenv("LD_PRELOAD");
106			if (preload == NULL)
107			return False;
108
109			if (strstr(preload, "esddsp") == NULL)
110			return False;
111
112			return True;
113			}
114
115	jsorg71	1372	RD_BOOL
116	ossman_	1361	oss_open(int fallback)
117	matthewc	475	{
118	ossman_	1361	int caps;
119
120			if (dsp_fd != -1)
121	matthewc	475	{
122	ossman_	1361	dsp_refs++;
123
124			if (dsp_mode == O_RDWR)
125			return True;
126
127			if (dsp_mode == fallback)
128			return True;
129
130			dsp_refs--;
131	matthewc	475	return False;
132			}
133
134	ossman_	1361	dsp_configured = False;
135	ossman_	1376	dsp_broken = False;
136	ossman_	1361
137			dsp_mode = O_RDWR;
138			dsp_fd = open(dsp_dev, O_RDWR \| O_NONBLOCK);
139			if (dsp_fd != -1)
140			{
141			ioctl(dsp_fd, SNDCTL_DSP_SETDUPLEX, 0);
142
143			if ((ioctl(dsp_fd, SNDCTL_DSP_GETCAPS, &caps) < 0) \|\| !(caps & DSP_CAP_DUPLEX))
144			{
145			close(dsp_fd);
146			dsp_fd = -1;
147			}
148			}
149
150			if (dsp_fd == -1)
151			{
152			dsp_mode = fallback;
153
154			dsp_fd = open(dsp_dev, dsp_mode \| O_NONBLOCK);
155			if (dsp_fd == -1)
156			{
157			perror(dsp_dev);
158			return False;
159			}
160			}
161
162			dsp_refs++;
163
164	ossman_	1302	in_esddsp = detect_esddsp();
165
166	matthewc	475	return True;
167			}
168
169			void
170	stargo	1255	oss_close(void)
171	matthewc	475	{
172	ossman_	1361	dsp_refs--;
173
174			if (dsp_refs != 0)
175			return;
176
177	ossman_	1346	close(dsp_fd);
178			dsp_fd = -1;
179	matthewc	475	}
180
181	jsorg71	1372	RD_BOOL
182	ossman_	1361	oss_open_out(void)
183			{
184			if (!oss_open(O_WRONLY))
185			return False;
186
187			dsp_out = True;
188
189			return True;
190			}
191
192			void
193			oss_close_out(void)
194			{
195			oss_close();
196
197			/* Ack all remaining packets */
198			while (!rdpsnd_queue_empty())
199			rdpsnd_queue_next(0);
200
201			dsp_out = False;
202			}
203
204	jsorg71	1372	RD_BOOL
205	ossman_	1361	oss_open_in(void)
206			{
207			if (!oss_open(O_RDONLY))
208			return False;
209
210			dsp_in = True;
211
212			return True;
213			}
214
215			void
216			oss_close_in(void)
217			{
218			oss_close();
219
220			dsp_in = False;
221			}
222
223	jsorg71	1372	RD_BOOL
224	jsorg71	1364	oss_format_supported(RD_WAVEFORMATEX * pwfx)
225	matthewc	475	{
226			if (pwfx->wFormatTag != WAVE_FORMAT_PCM)
227			return False;
228			if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2))
229			return False;
230			if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16))
231			return False;
232
233			return True;
234			}
235
236	jsorg71	1372	RD_BOOL
237	jsorg71	1364	oss_set_format(RD_WAVEFORMATEX * pwfx)
238	matthewc	475	{
239	ossman_	1361	int fragments;
240	jsorg71	1372	static RD_BOOL driver_broken = False;
241	matthewc	475
242	ossman_	1361	if (dsp_configured)
243			{
244			if ((pwfx->wBitsPerSample == 8) && (format != AFMT_U8))
245			return False;
246			if ((pwfx->wBitsPerSample == 16) && (format != AFMT_S16_LE))
247			return False;
248
249			if ((pwfx->nChannels == 2) != !!stereo)
250			return False;
251
252			if (pwfx->nSamplesPerSec != snd_rate)
253			return False;
254
255			return True;
256			}
257
258	ossman_	1346	ioctl(dsp_fd, SNDCTL_DSP_RESET, NULL);
259			ioctl(dsp_fd, SNDCTL_DSP_SYNC, NULL);
260	matthewc	475
261			if (pwfx->wBitsPerSample == 8)
262			format = AFMT_U8;
263			else if (pwfx->wBitsPerSample == 16)
264			format = AFMT_S16_LE;
265
266	stargo	1247	samplewidth = pwfx->wBitsPerSample / 8;
267	stargo	510
268	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_SETFMT, &format) == -1)
269	matthewc	475	{
270			perror("SNDCTL_DSP_SETFMT");
271	astrand	1318	oss_close();
272	matthewc	475	return False;
273			}
274
275	stargo	760	if (pwfx->nChannels == 2)
276	matthewc	475	{
277	stargo	760	stereo = 1;
278	stargo	1247	samplewidth *= 2;
279	stargo	760	}
280			else
281			{
282			stereo = 0;
283			}
284
285	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_STEREO, &stereo) == -1)
286	stargo	760	{
287	matthewc	475	perror("SNDCTL_DSP_CHANNELS");
288	astrand	1318	oss_close();
289	matthewc	475	return False;
290			}
291
292	stargo	1286	oss_driver.need_resampling = 0;
293	stargo	1247	snd_rate = pwfx->nSamplesPerSec;
294	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_SPEED, &snd_rate) == -1)
295	stargo	510	{
296	stargo	1286	int rates[] = { 44100, 48000, 0 };
297			int *prates = rates;
298
299			while (*prates != 0)
300			{
301			if ((pwfx->nSamplesPerSec != *prates)
302	ossman_	1346	&& (ioctl(dsp_fd, SNDCTL_DSP_SPEED, prates) != -1))
303	stargo	1286	{
304			oss_driver.need_resampling = 1;
305			snd_rate = *prates;
306			if (rdpsnd_dsp_resample_set
307			(snd_rate, pwfx->wBitsPerSample, pwfx->nChannels) == False)
308			{
309			error("rdpsnd_dsp_resample_set failed");
310	astrand	1318	oss_close();
311	stargo	1286	return False;
312			}
313
314			break;
315			}
316			prates++;
317			}
318
319			if (*prates == 0)
320			{
321			perror("SNDCTL_DSP_SPEED");
322	astrand	1318	oss_close();
323	stargo	1286	return False;
324			}
325	matthewc	475	}
326
327	stargo	1247	/* try to get 12 fragments of 2^12 bytes size */
328			fragments = (12 << 16) + 12;
329	ossman_	1346	ioctl(dsp_fd, SNDCTL_DSP_SETFRAGMENT, &fragments);
330	stargo	761
331	stargo	1247	if (!driver_broken)
332	stargo	761	{
333			audio_buf_info info;
334
335	astrand	801	memset(&info, 0, sizeof(info));
336	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
337	stargo	761	{
338			perror("SNDCTL_DSP_GETOSPACE");
339	astrand	1318	oss_close();
340	stargo	761	return False;
341			}
342
343			if (info.fragments == 0 \|\| info.fragstotal == 0 \|\| info.fragsize == 0)
344			{
345			fprintf(stderr,
346			"Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n",
347			info.fragments, info.fragstotal, info.fragsize);
348	stargo	1247	driver_broken = True;
349	stargo	761	}
350			}
351
352	ossman_	1361	dsp_configured = True;
353
354	matthewc	475	return True;
355			}
356
357			void
358	stargo	1255	oss_volume(uint16 left, uint16 right)
359	stargo	491	{
360			uint32 volume;
361
362	astrand	499	volume = left / (65536 / 100);
363			volume \|= right / (65536 / 100) << 8;
364	stargo	509
365	ossman_	1346	if (ioctl(dsp_fd, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1)
366	stargo	491	{
367	stargo	1275	warning("hardware volume control unavailable, falling back to software volume control!\n");
368	stargo	1269	oss_driver.wave_out_volume = rdpsnd_dsp_softvol_set;
369	stargo	1275	rdpsnd_dsp_softvol_set(left, right);
370	stargo	491	return;
371			}
372			}
373
374			void
375	stargo	1255	oss_play(void)
376	matthewc	475	{
377			struct audio_packet *packet;
378			ssize_t len;
379			STREAM out;
380
381	ossman_	1346	/* We shouldn't be called if the queue is empty, but still */
382	stargo	1254	if (rdpsnd_queue_empty())
383	stargo	1247	return;
384	matthewc	475
385	stargo	1254	packet = rdpsnd_queue_current_packet();
386	stargo	1247	out = &packet->s;
387	matthewc	475
388	stargo	1247	len = out->end - out->p;
389	stargo	761
390	ossman_	1346	len = write(dsp_fd, out->p, (len > MAX_LEN) ? MAX_LEN : len);
391	stargo	1247	if (len == -1)
392			{
393			if (errno != EWOULDBLOCK)
394	ossman_	1376	{
395			if (!dsp_broken)
396			perror("RDPSND: write()");
397			dsp_broken = True;
398			rdpsnd_queue_next(0);
399			}
400	stargo	1247	return;
401			}
402	stargo	761
403	ossman_	1376	dsp_broken = False;
404
405	stargo	1247	out->p += len;
406	ossman_	1302
407	stargo	1247	if (out->p == out->end)
408			{
409	ossman_	1302	int delay_bytes;
410			unsigned long delay_us;
411			audio_buf_info info;
412	stargo	761
413	ossman_	1302	if (in_esddsp)
414	matthewc	475	{
415	ossman_	1302	/* EsounD has no way of querying buffer status, so we have to
416			* go with a fixed size. */
417			delay_bytes = out->size;
418	stargo	1247	}
419			else
420			{
421	ossman_	1302	#ifdef SNDCTL_DSP_GETODELAY
422			delay_bytes = 0;
423	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_GETODELAY, &delay_bytes) == -1)
424	ossman_	1302	delay_bytes = -1;
425			#else
426			delay_bytes = -1;
427			#endif
428
429			if (delay_bytes == -1)
430			{
431	ossman_	1346	if (ioctl(dsp_fd, SNDCTL_DSP_GETOSPACE, &info) != -1)
432	ossman_	1302	delay_bytes = info.fragstotal * info.fragsize - info.bytes;
433			else
434			delay_bytes = out->size;
435			}
436	matthewc	475	}
437	ossman_	1302
438			delay_us = delay_bytes * (1000000 / (samplewidth * snd_rate));
439			rdpsnd_queue_next(delay_us);
440	matthewc	475	}
441			}
442	stargo	1255
443	ossman_	1361	void
444			oss_record(void)
445			{
446			char buffer[32768];
447			int len;
448
449			len = read(dsp_fd, buffer, sizeof(buffer));
450			if (len == -1)
451			{
452			if (errno != EWOULDBLOCK)
453	ossman_	1376	{
454			if (!dsp_broken)
455			perror("RDPSND: read()");
456			dsp_broken = True;
457			rdpsnd_queue_next(0);
458			}
459	ossman_	1361	return;
460			}
461
462	ossman_	1376	dsp_broken = False;
463
464	ossman_	1361	rdpsnd_record(buffer, len);
465			}
466
467	stargo	1351	struct audio_driver *
468			oss_register(char *options)
469			{
470	ossman_	1356	memset(&oss_driver, 0, sizeof(oss_driver));
471
472			oss_driver.name = "oss";
473	stargo	1351	oss_driver.description =
474	ossman_	1356	"OSS output driver, default device: " DEFAULTDEVICE " or $AUDIODEV";
475	ossman_	1345
476	stargo	1351	oss_driver.add_fds = oss_add_fds;
477			oss_driver.check_fds = oss_check_fds;
478	ossman_	1346
479	ossman_	1361	oss_driver.wave_out_open = oss_open_out;
480			oss_driver.wave_out_close = oss_close_out;
481	stargo	1351	oss_driver.wave_out_format_supported = oss_format_supported;
482			oss_driver.wave_out_set_format = oss_set_format;
483			oss_driver.wave_out_volume = oss_volume;
484	ossman_	1345
485	ossman_	1361	oss_driver.wave_in_open = oss_open_in;
486			oss_driver.wave_in_close = oss_close_in;
487			oss_driver.wave_in_format_supported = oss_format_supported;
488			oss_driver.wave_in_set_format = oss_set_format;
489			oss_driver.wave_in_volume = NULL; /* FIXME */
490
491	stargo	1351	oss_driver.need_byteswap_on_be = 0;
492			oss_driver.need_resampling = 0;
493	ossman_	1345
494	stargo	1255	if (options)
495			{
496			dsp_dev = xstrdup(options);
497			}
498			else
499			{
500			dsp_dev = getenv("AUDIODEV");
501
502			if (dsp_dev == NULL)
503			{
504	ossman_	1356	dsp_dev = DEFAULTDEVICE;
505	stargo	1255	}
506			}
507
508			return &oss_driver;
509			}